Is 9999 a prime number?
No, 9999 is not a prime number. It is divisible by 3: 9999 = 3 × 3333.
Is 9999 prime?
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A prime number has exactly two factors: 1 and itself.
- 2
It is enough to test the primes up to √9999 ≈ 99.99. If none of them divides 9999, it is prime.
- 3
3 divides 9999 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 9999 = 3^{2} \times 11 \times 101 \]Testing 9999 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 9999 ÷ 2 | leaves 1 |
| 3 | 9999 ÷ 3 | divides exactly (3333) |
| 5 | 9999 ÷ 5 | leaves 4 |
| 7 | 9999 ÷ 7 | leaves 3 |
| 11 | 9999 ÷ 11 | divides exactly (909) |
| 13 | 9999 ÷ 13 | leaves 2 |
| 17 | 9999 ÷ 17 | leaves 3 |
| 19 | 9999 ÷ 19 | leaves 5 |
| 23 | 9999 ÷ 23 | leaves 17 |
| 29 | 9999 ÷ 29 | leaves 23 |
| 31 | 9999 ÷ 31 | leaves 17 |
| 37 | 9999 ÷ 37 | leaves 9 |
Questions
Is 9999 a prime number?
No, 9999 is not a prime number. It is divisible by 3: 9999 = 3 × 3333.
What is the next prime after 9999?
10007.
What is the prime number before 9999?
9973.
What are the factors of 9999?
1, 3, 9, 11, 33, 99, 101, 303, 909, 1111, 3333, 9999.